What does he have to do to get even a sliver of attention? He wasn't even listening to the conversation anymore, he was simply sitting in his corner and brooding over how noone is paying any attention to him. Eventually Anthony just got way too desperate, stood up and walked to the bed, and sat down right next to Noah. If he gets beat up for this, that's fine. That means that they care enough about him to take the effort to do that. That's good.